ATE81643T1 - PROCESS FOR THE PRODUCTION OF BINDING CALCIUM SULFATE FROM CALCIUM SULFATE DIHYDRATE. - Google Patents

PROCESS FOR THE PRODUCTION OF BINDING CALCIUM SULFATE FROM CALCIUM SULFATE DIHYDRATE.

Info

Publication number
ATE81643T1
ATE81643T1 AT89115971T AT89115971T ATE81643T1 AT E81643 T1 ATE81643 T1 AT E81643T1 AT 89115971 T AT89115971 T AT 89115971T AT 89115971 T AT89115971 T AT 89115971T AT E81643 T1 ATE81643 T1 AT E81643T1
Authority
AT
Austria
Prior art keywords
calcium sulfate
dihydrate
production
binding
gypsum
Prior art date
Application number
AT89115971T
Other languages
German (de)
Inventor
Heinz Dr Rennen
Winfried Dr Spickermann
Original Assignee
Rigips Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rigips Gmbh filed Critical Rigips Gmbh
Application granted granted Critical
Publication of ATE81643T1 publication Critical patent/ATE81643T1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B11/00—Calcium sulfate cements
    • C04B11/02—Methods and apparatus for dehydrating gypsum
    • C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

A process for the preparation of calcium sulphates, capable of setting, from calcium sulphate dihydrate of natural or synthetic origin, such as gypsum from flue gas desulphurisation, by calcining the dihydrate with added oxalic acid, which has been admixed to the gypsum in a fine particle size or dissolved or as the dihydrate, at elevated temperatures is described. <IMAGE>
AT89115971T 1989-08-30 1989-08-30 PROCESS FOR THE PRODUCTION OF BINDING CALCIUM SULFATE FROM CALCIUM SULFATE DIHYDRATE. ATE81643T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89115971A EP0414937B1 (en) 1989-08-30 1989-08-30 Process for the preparation of curable calcium sulphates from calcium sulphate dihydrate

Publications (1)

Publication Number Publication Date
ATE81643T1 true ATE81643T1 (en) 1992-11-15

Family

ID=8201819

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89115971T ATE81643T1 (en) 1989-08-30 1989-08-30 PROCESS FOR THE PRODUCTION OF BINDING CALCIUM SULFATE FROM CALCIUM SULFATE DIHYDRATE.

Country Status (3)

Country Link
EP (1) EP0414937B1 (en)
AT (1) ATE81643T1 (en)
DE (1) DE58902525D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19615715C1 (en) * 1996-04-22 1997-11-27 Sicowa Verfahrenstech Recrystallising calcium sulphate di:hydrate
US8945462B2 (en) * 2006-06-29 2015-02-03 Yoshino Gypsum Co., Ltd. Methods for manufacturing a calcined gypsum and a gypsum board

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907668A (en) * 1956-03-30 1959-10-06 United States Gypsum Co Calcination of gypsum
GB1079502A (en) * 1963-05-28 1967-08-16 Cafferata & Co Ltd Improvements in and relating to the production of calcium sulphate hemihydrate
EP0237802B1 (en) * 1986-02-20 1990-05-09 Gebr. Knauf Westdeutsche Gipswerke KG Process for the preparation of calcium sulphate anhydrite and curable calcium sulphates
DE3615717A1 (en) * 1986-05-09 1987-11-12 Benckiser Gmbh Joh A METHOD FOR THE HYDROTHERMAL CONVERSION OF SMOKE GAS DESULFURATION PLASTER IN CALCIUM SULFATE (ALPHA) HEMIHYDRATE

Also Published As

Publication number Publication date
EP0414937A1 (en) 1991-03-06
DE58902525D1 (en) 1992-11-26
EP0414937B1 (en) 1992-10-21

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee